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U Gyllensten

Publications and source records attributed to U Gyllensten.

58 records · Page 4Linked to original sources
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Maternal inheritance of mitochondrial DNA during backcrossing of two species of mice.

As judged by restriction analysis, mitochondrial DNA shows strictly maternal inheritance during 6-8 generations of backcrossing in both directions between Mus domesticus and Mus spretus. The average number of paternal mitochondrial genomes contributed to the next generation is estimated to be no more than one per thousand maternal mitochondrial genomes contributed. Despite the estimated accumulation of over 2000 mutational differences between M. spretus and M. domesticus mtDNAs since their divergence from a common ancestor, each of these mitochondrial DNAs, whether on a M. spretus or a M. domesticus nuclear background, allows mice to develop with seemingly normal viability and fertility.

Animals↗
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Mitochondrial sequence variants in patients with schizophrenia.

To investigate whether mitochondrial mutations underly susceptibility to schizophrenia, we sequenced the mtDNAs of two unrelated Swedish patients with schizophrenia and low cytochrome oxidase activity and two maternally related Scottish patients from a family with suspected maternal inheritance of the disease. We found five substitutions in coding regions that have not previously been described as polymorphisms. These new substitutions were studied in 81 schizophrenic patients and five control groups from Sweden and Scotland and found to differ in frequency between populations, emphasizing the importance of using large and well-defined control materials for evaluating the association of mtDNA mutations with disease. The results do not lend strong support to the association of a particular mtDNA substitution with increased risk for schizophrenia. However, the trend towards a higher frequency of substitutions in the patients deserves further attention.

Conserved Sequence↗